REGIONAL STABILITY OF DIFFERENTIAL EQUATIONS GOVERNING SHIP MOTIONS

A ship executing a steady turn corresponds mathematically to a critical point of the differential equations governing the motion of the ship. For cases in which this critical, or equilibrium point is locally asymptotically stable, it is of interest to obtain estimates on the size of the region of stability. In this work we present a method which enables such estimates to be obtained and which also provides a measure of the rapidity with which the ship returns to the steady turn. Application of this method to a discussion of the Dieudonne Spiral Test and of the Pull-Out maneuver is given. For this work we have selected hulls of the Mariner type, both stable and unstable.

• Supplemental Notes:
  • Presented at the 4th Ship Control Systems Symposium, 1975.
• Corporate Authors:

  Royal Netherlands Naval College

  P-de Hoochweg
  129 Rotterdam,   Netherlands 
• Authors:
  • Strandhagen, A G
  • Mast, C B
• Publication Date: 1975

Media Info

• Pagination: n.p.

Subject/Index Terms

• TRT Terms: Spiral flow tests; Turning traffic
• Old TRIS Terms: Course stability; Spiral tests; Turning characteristics
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00323699
• Record Type: Publication
• Source Agency: Stevens Institute of Technology
• Files: TRIS
• Created Date: May 21 1981 12:00AM